Automatic chucking-lathe



2 sheetssheet 1.

(No Modem J. W. BROWN, Jr. AUTOMATIC GHUGKING LATHE.

Patented Mar.. 23, 1897;

l sill.. E.

17g/m2751507'.- Johz Wilson rawn/Jl' I By his atorlwys mwv 'me Noms PETER cu, PNoTcALnno.. wAsNmm'nN. n. c.

2 Sheets-Sheet 2.

(No Model.)

J. W. BRDWN, Jr. AUTOMATLG GHUOKING LATES.

Patented Mar. 23, 1897.

l v f 1| l f ff f l E l Inventor.- Jo/wz, Wlson rown J? Witnesses P To Lnno.. wAsmNcToN u c i' @En J OIIN IVILSON BROWN, JR., OF PHILADELPHIA, PENNSYLVANIA.

AUTOMATIC CHUCKlNG-LATHE.

SPECIFICATION forming part of Letters Patent No. 579,357', dated March 23, 1897.

Application filed June 7, 1893.

To @ZZ whom, it may concern:

Be it known that I, JOHN VILSON BROWN, Jr., a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Automatic Chucking-Lathes, of which the following is a specification.

My invention relates to improvements in machines for turning, drilling, or tapping metallic pieces which are automatically fed to the machine. Machines 0f this class are commonly known as automatic turret-lathes.

The object of my invention is to so construct a machine that eccentric pieces can be fed automatically to the machine and turned, drilled, or tapped.

I include in the Wort eccentric all pieces that have not a true concentric periphery. If, for instance, a ring has projections on it, although the main portion ofthe ring is concentric, the projections would bring it under the term eccentric.

Referring to the accompanying drawings, Figure l is a side view, partlyin section, illustrating my invention as applied to the ordinary turret-lathe. Fig. 2 is a transverse section on the line l 2, Fig. l. Figs. 3 and 4 are views showing the parts in different positions. Figs. 5 and 6 are plan views of portions of the machine shown in Figs. 3 and 4. Fig. 7 isa view of the plunger; and Fig. S is a longi tudinal section on the line 3 4, Fig. l.

I will briefly describe the turret-lathe shown in Fig. l, although the lathe is of the ordinary construction.

A is the frame, mounted in bearings, in which is the shaft B, carrying the chuck B', which must be shaped to accommodate the articleto be turned. On the shaft B are the fast and loose pulleys b Z2 h2. The chuck-operating mechanism b3 is controlled by the cam-lugs c on the cam-wheel O', mounted on the camshaft O, having its bearings in the frame A. On this shaft is the belt-shifter cam O2, the cam O8 for reciprocating the turretslide D, the fast and slow feed shiftingcam O4, and the piece-feeding cam O5. The shaft C is driven from a driving-shaft a, having a worm a', meshing with a worm-wheel c on the shaft C. The cam-disk O5 controls Serial No. 4761806. (No model.)

the movement of the feeding device for the pieces and the slide-rest. Thus it will be seen that as the shaft O slowly revolves, the several cams on the shaft being timed, it throws into operation the different parts of' the machine at the proper moment, so as to automatically feed, clamp, turn, and, if necessary, drill and screw-thread the pieces and release them when finished.

Prior to my invention it has only been possible to automatically feed concentric pieces in machines of this character, but by the improvements Which I Will now proceed to de, scribe I am enabled to automatically feed eccentric pieces of almost any shape.

Mounted at one side of the chuck B', in the present instance, is a vertical hopper E, preferably open in front and of a size so as to properly confine the pieces @c to be operated upon. These pieces in the present instance are rings having corrugations on the periphery and having one or more lugs on the periphery, as well as lugs x3 on one face. These rings have to be turned and screw-threaded on the inside, and the machine shown in the drawings turns the rings and screw-threads them. Directly below the hopper E is a reciprocating slide F, having a pocket f to re,- ceive one of the rings, as shown in Fig. 3. This slide in the present instance is composed of the slide proper, F, mounted on the portion A2 of' the frame A, and the adjustable head F2, in which is formed the pocket f. The head F2 can be adjusted on the slide proper, F', and can be removed when a different piece is to be turned.

Carried by the slide F is a slide-rest F3, on which is mounted the tool-post F4, and the slide-rest moves with the slide F, so as to bring the tool in cutting position in front of the chuck, as shown in Fig. 3.

On the turret D is a plunger CZ', Which is moved in line with the tool when it is in cutting position, and as the turret-slide D moves forward the plunger will force the cuttingtool into the ring to be cut, and as the plunger is retracted the tool will be Withdrawn by a spring or Weight.

The slide F is controlled by the cam-disk C5, having cam-lugs on its face, as shown in IOO Figs. 1 and 2. The cam-lug c2 acts upon the lever G, pivoted at g to a portion A2 of the frame, and the lugs c3 and c4 act upon the lever G', pivoted to the portion g of the frame. The lever G' moves the slide so as to transfer a piece from the hopper into position in front of the chuck and to move the slide-rest back, while the cam G moves the slide-rest forward and returns the slide, so that the pocket can receive another piece.

The head F2 has an opening f directly in front of the pocket f and is open at the back, so that the piece can be forced out of the pocket and into the chuck. The opening f is of sufficient size to admit the plunger d on the turret D.

Extending from the base of the hopper E to the chuck is a plate e, which closes the rear of the pocket f during the travel of the slide from the position shown in Fig. 3 to the position shown in Fig. 4.

lVhen the slide reaches the position shown in Fig. 4, the piece is engaged by a detent I, secured in the p-resent instance to the hopper and in the form of a spring, so that the piece will not turn with the chuck until it is within its jaws. Other forms of detents may be used without departing from my invention.

' It will be understood that when the piece moves past the plate c and assumes a position in front of the chuck it bears against the face of the chuck and would be turned by the chuck, owing to frictional contact, but by providing the detent it is kept from turning, and at the proper time, when its projections aline with the cavities in the chuck to receive them, the spring-plunger on the turret will force the piece into the chuck, the projections entering their respective cavities. This movement of the plunger frees the piece from the control of the detent.

The cams are so timed that the pocket f will be returned and the slide-rest will be moved in front of the chucked piece and will be so operated by the combined movement of the cam C5 and the cams controlling the turret-head as to properly turn a portion of the interior of the ring, after which the sliderest is moved about half-way, so that the tap d6, carried by the turret, can enter the ring and tap a screw-thread therein, after which the parts are so operated as to allow the chuck to release the finished piece.

The plunger d', as shown in Fig. '7, is springseated, being reduced at d2. A spring d4 is mounted between a shoulder on the plunger d and a shoulder on the fixed portion d3, adapted to the turret-head D. The head d5 of the plunger d passes through the opening 6o j" in the slide and rests against the flange a? of the piece 0c. The projections or lugs c3 on the face of the piece w rest against the plate b4, carried by a cam-controlled stem b5, Fig. 7, which is so actuated as to discharge the piece from the chuck when finished.

inthe chuck moves forward until it is flush' with the face of the chuck, as shown in Fig. 7, giving a good bearing for the piece when it is moved in front of the chuck. When the spring-plunger is forced into the pocket, it clamps the piece between its head d5 and the plate b4, and when the notches of the chuck aline with the projections on the piece the plungers carry the piece into the chuck.

The special feeding mechanism is not absolutely necessary, although preferable, as the plunger may carry the piece to the chuck, and in some cases the feeding mechanism may be combined with the turret mechanism.

l claim as my invention- 1. ln a lathe for turning eccentric pieces, the combination of the revolving chuck for positively grasping the piece to be turned, a feeding device for feeding the piece to the position in front of the chuck, a detent engaging with the piece and preventing it from turning when in frictional contact with the chuck, with mechanism for forcing the piece into the chuck so that it will be positively engaged thereby, substantially as described.

2. In a lathe for turning eccentric pieces, the combination of the revolving chuck by which the piece is positively held, a feeding device for feeding the piece to a position in front of the chuck, a detent adapted to engage with the piece and prevent it froln turning with the chuck when in frictional contact therewith, with a plunger tending to force the piece into the chuck so that when the piece registers with the chuck it will be positively engaged thereby and will be freed from the detent, substantially as described.

3. The combination in a lathe for turning eccentric pieces of the chuck by which the piece is held, the feeding device for feeding the piece to a position in front of the chuck, a spring-detent engaging with t-he piece whereby it is prevented from turning when in frictional contact with the chuck, and a plunger for forcing the piece from the control of the detent and into positive engagement with the chuck.

at. The combination in a lathe for turning eccentric pieces, of the revolving chuck, the hopper, the reciprocating carrier for conveying the piece from the hopper to a position in front of the chuck, a spring-detent engaging with the piece and preventing it from turning, with a plunger for forcing the piece into the chuck and from under the control of the detent, substantially as set forth.

5. The combination in a lathe for turning eccentric pieces, of the revolving chuck, the feeding mechanism for feeding the pieces in front of the chuck, a detent engaging with the pieces preventing them from turning, with a spring-seated plunger, for forcing the pieces into the chuck and from under the control of the detent, substantially as specified.

IOO

TIO

6. The combination of therevolving chuck, In testimony whereof I have signed my a reciprocating slide it piece-feeding device name to this specification in the presence of carried by said slide, a slide-rest also carried two subscribing Witnesses.

by the slide, a cam for controlling the trans- J OIIN WILSON BROWN, JR. 5 verse movement of the slide-rest and a, turret- Witnesses:

plunger controlling the longitudinal move- VILLIAM A. BARR,

ment of the tool, substantially as set forth. JOSEPH II. KLEIN. 

